[Android] Switch to DeviceUtils versions of file functions.

build/android/pylib/uiautomator/test_package.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Class representing uiautomator test package."""
 
 import os
 
 from pylib import constants
 from pylib.instrumentation import test_jar
 
 
 class TestPackage(test_jar.TestJar):
   def __init__(self, jar_path, jar_info_path):
     test_jar.TestJar.__init__(self, jar_info_path)
 
     if not os.path.exists(jar_path):
       raise Exception('%s not found, please build it' % jar_path)
     self._jar_path = jar_path
 
   def GetPackageName(self):
     """Returns the JAR named that is installed on the device."""
     return os.path.basename(self._jar_path)
 
   # Override.
   def Install(self, device):
-    device.old_interface.PushIfNeeded(self._jar_path,
-                                      constants.TEST_EXECUTABLE_DIR)
+    device.PushChangedFiles(self._jar_path, constants.TEST_EXECUTABLE_DIR)